Tobacco pipe



J. W. MCULUCN.

TOBACCO PIPE. APPLICATION HLED SEPT.; 1919.

l nLjLQpggg Eaente 289 1922.

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NETE STATES arena amica.

roBAcco PIPE;

Specificationv of Letters Patent.

Patented. Mia-r. 28, 1922.

Application iiled September 2, 1919. Serial No. 321,168.

To all whom t may concern.'

Be it known that I, JAMES W. A. Mc- KrLLIoAN, a subject of the King of Great Britain, and resident of the city of Montreal, in the Province of Quebec and Dominion of Canada, have invented certain new and useful Improvements in Tobacco Pipes, of which the following is a full, clear, and exact description.

This invention relates to improvements in tobacco pipes, and the object of the invention is to provide a pipe which may be manufactured at Vvery small additional cost and which will give a dry, cool smoke.

A further object is to provide a pipe which will absolutely prevent the entrance of saliva into the pipe bowl. The device consists of a pipe of substantially ordinary shape, having between the stem proper and bowl an upwardly projecting barrier which will electually prevent the entrance of moisture from the stem into This barrier further serves to provide an elongated smoke passage in which the smoke cools with a consequent condensation of its tarry constituents. p

In the drawings which illustrate the invention Fig. 1 is a vertical longitudinal section of the pipe.

Fig. 2 is a section on the line 2-2, Figure 1.

Fig. 3 is an elevation of another type of moisture dam.

Fig. 4 is a sectional view illustrating a dam chamber constructed separately from the pipe.

Referring more particularly to the drawings, 11 designates the bowl, 12 the stem and 13 the mouth-piece of a pipe, the mouth-piece being fitted to the stem in any well known manner. A bore 14 extends through the mouth-piece and stem into the bottom of the bowl. A second bore 15 is provided in the bowl approximately parallel with the axis thereof and intersecting the bore 14.y This bore 15 may be open at either the bottom or the top end or at both. A portion of the length of the bore 14 may be enlarged as at 16, such enlargement extending from the bore 15 a suitable distance into the mouth-piece. A barrier or dam 17 is inserted in the bore 15 and is located transversely of the pipe, as clearly shown in Figure 2, so that it separates that portion of the bore adjacent the bowl from the remainder of the bore. In Figure 1, the construction is shown in its simplest form with the bore 15 open at the bottom and the dam inserted from the bottom and held by means of a screw or push plug 18. In the construction shown, the upper end of the bore 15 is closed by a plug 19, which may be removed to facilitate cleaning of the bore 15. Obviously, the end of the bore 15 may be permanently closed. The upper end of the dam 17 does not extend quite to the closed end of the bore, so that smoke from the bowl may flow up one side of the dam, over the top of the same, and down theother side into the main portion of the bore '14. This dam, whichI fits tightly in the bore 15, is preferably a simple, cylindrical member grooved on opposite sides. The grooves may be straight, as shown in 2, or may be helical as shown 1n Figure 3. lVhen it is desired to insert the dam from the top of the bowl, the plug 19 will be replaced by the plug 18 carrylng the dam. In Such a case, the plugs must be screwed in until the dam seats 'on the plug at the bottom of the bore and a hole 20, shown in Figure 3, provided through the dam adjalcent its carrying plug 18 to enable the smoke to get from one groove to the other. In order to delay the passage of smoke through the stem and mouth-piece, a double worm 21,

Figures 1 and:

which fits tightly in the enlarged portion 16 of the bore, may be provided, so that the smoke passing throu h the grooves of the worm will have amp e opportunity to cool and the tarry constituents thereof will condense in the grooves of the worm, so that they will not reach the smokers mouth. The double worm which divides the smoke will hasten this cooling. Obviously, the worm 21 may be omitted.

The operation of the pipe is extremely simple. The smoke flows in the manner previously described. When it 'is desired to clean the pipe, the dam 17, plug 19 and worm 21 are removed, the latter by first removing the mouth-piece which carries the worm. Pipe cleaners may now be passed from end to end through the bores 14 and l5. If the dam or worm or both should be lost or broken, the usefulness of the pipe is not destroyed as it may be smoked in the face of the stem, the dam being screwed in from the lower surface as before so as to block the bore of the stem and divert smoke up into the attached dam chamber.

Having thus described my invention, what I claim is l. In a tobacco pipe, the combination with a bowl, stem and mouth-piece, of a chamber extending upwardly from the stem bore, and a dam in the stern extending upwardly within said chamber having helically disposed smoke passages on opposite sides thereof, and a communication passage between the helical smoke passages of said dam near the top of the chamber, said passages connecting the bowl with the bore of the stem and mouthpiece.

2. In a tobacco pipe, the combination with a bowl, stem and mouth-piece, of a dam located between the bowl and mouth-piece arranged to stop passage of liquid between the bowl and mouth-piece and to increase the len h of smoke passage, and a double helically grooved member inserted in the mouth-piece forminga duplex -smoke passage of elongated form.

3.- In combination with a device according to claim l, a double helically grooved member inserted in the mouth-piece forming a duplex smoke passage and co-operating with the helically grooved dam in increasing the length of smoke passage between the bowl and mouth-piece'.

In witness whereof, I have hereunto set m hand.

y JAMES W. A. MCKILLICAN. 

